One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,3)(5,6)(7,11)(8,10)(9,12)(13,14,18,23)(15,19,24,28)(16,21,26,27)(17,20,25,22)(1,2,4,3)(5,7)(6,9)(8,12)(10,11)(13,15,18,24)(14,19,23,28)(16,25,26,17)(20,21,22,27)(1,3,4,2)(14,20)(15,24)(17,25)(19,27)(21,28)(22,23)(7,12)(9,11)(13,16)(14,21)(15,25)(17,24)(18,26)(19,22)(20,28)(23,27) involution — undirected(6,10)(9,11)(15,24)(16,26)(19,28)(21,27) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.